Adobe ACROBAT READER 7.0 Manual page 77

About completing Adobe PDF forms
Adobe PDF forms can be noninteractive or interactive. Noninteractive PDF forms must be
printed in order to be filled in, while interactive PDF forms contain form fields you can
fill in on-screen. A PDF form is made interactive if the creator of the PDF form set up the
document with appropriate form fields and properties in Adobe Designer, Adobe Acrobat
Professional, Acrobat Content Server, or even Adobe® GoLive® CS.
You can print a PDF form but you can't save the data that you enter into the PDF form,
unless the form author included additional usage rights in the PDF file. Instead, you can
submit the form data via email or the web if the PDF author provided these options.